GPT-5 Image Mini combines OpenAI's advanced language capabilities, powered by [GPT-5 Mini](https://openrouter.ai/openai/gpt-5-mini), with GPT Image 1 Mini for efficient image generation. This natively multimodal model features superior inst…
Model details →OpenAI: GPT-5 Image Mini vs xAI: Grok 4
OpenAI: GPT-5 Image Mini wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning cannot be disabled, and the reasoning ef…
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5 Image Mini | xAI: Grok 4 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 400K | 256K | 🏆 OpenAI: GPT-5 Image Mini |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.50 | $3.00 | 🏆 OpenAI: GPT-5 Image Mini |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $2.00 | $15.00 | 🏆 OpenAI: GPT-5 Image Mini |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: GPT-5 Image Mini better than xAI: Grok 4?
OpenAI: GPT-5 Image Mini wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: GPT-5 Image Mini and xAI: Grok 4?
Input: $2.50 vs $3.00 per 1M tokens. Output: $2.00 vs $15.00 per 1M tokens.
What context windows do OpenAI: GPT-5 Image Mini and xAI: Grok 4 support?
OpenAI: GPT-5 Image Mini supports up to 400K tokens. xAI: Grok 4 supports up to 256K tokens.
Do both OpenAI: GPT-5 Image Mini and xAI: Grok 4 support tool calling?
OpenAI: GPT-5 Image Mini: yes. xAI: Grok 4: yes.